串口将接收到的数据，进行解析后，使用QT绘图，动态刷新显示。 先将项目文件中增加charts支持 在ui中使用graphic view 控件占用图形显示的位置，并将控件提升为QChartView控件。 Qchart 可以绘制折线、条形图或饼图。折线需要有QLineSeries 容纳折线的坐标数据。

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